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Search: id:A112638
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| A112638 |
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Power each digit individually according to its position and add the numbers. |
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+0
1
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| 2, 4, 16, 46, 196, 946, 8296, 65246, 385596, 1568346, 3925096, 17165846, 59491596, 333414346, 1000627096, 1003689846, 1013327596, 1019992346, 1099915096, 1899135846, 8291221596, 65211444346, 385412777096, 1566619439846, 3899692777596
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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As the sequence tends to infinity the position of the units is always 6. The position of 10 is 4 or 9. And so on.
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EXAMPLE
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a(1)= 2
a(2)= 2^2 = 4
a(3)= 4^2 = 16
a(4)= 1^2 *10 + 6^2 = 10 + 36 = 46
a(5)= 4^2 *10 + 6^2 = 160 + 36 = 196
a(6)= 1^2 *100 + 9^2 *10 + 6^2 = 100 + 810 +36 = 946
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PROGRAM
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(PARI) modN(n) = { local(resul, nshif, d) ; nshif = n; d = 0 ; resul = 0 ; while(nshif > 0, resul += 10^d* ((nshif % 10)^2) ; d++ ; nshif = floor(nshif/10) ; ) ; return(resul) ; } { an=2 ; print(an, ", ") ; for (n = 2, 30, an=modN(an) ; print(an, ", ") ; ) } - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 15 2006
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CROSSREFS
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Sequence in context: A133465 A110128 A101061 this_sequence A077162 A128903 A103435
Adjacent sequences: A112635 A112636 A112637 this_sequence A112639 A112640 A112641
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KEYWORD
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nonn
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AUTHOR
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Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 27 2005
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 15 2006
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